Stadium: Court 6 Round: 25 Ground: Clay
| ATP Munich | 2021/04/24 11:00 | Mischa Zverev v Daniel Elahi Galan | 3-6,3-6 |
| ATP Monte Carlo | 2021/04/10 10:20 | Mischa Zverev v Juan Ignacio Londero | 4-6,1-6 |
| Challenger Oeiras | 2021/04/08 13:00 | Mischa Zverev v Tiago Cacao | 3-6,6-1,6-7 |
| ATP Miami | 2021/03/24 18:55 | James Duckworth v Mischa Zverev | 6-2,4-6,6-4 |
| ATP Miami | 2021/03/23 18:10 | Matteo Viola v Mischa Zverev | 7-6,4-6,1-6 |
| ATP Miami | 2021/03/22 19:15 | Mischa Zverev v Danilo Petrovic | 7-6,6-2 |
| ATP Acapulco | 2021/03/14 01:40 | Joao Sousa v Mischa Zverev | 7-5,5-7,7-5 |
| ITF M25 Faro | 2021/03/05 12:00 | Mischa Zverev v Maximilian Neuchrist | 4-6,6-2,7-6 |
| ITF M25 Prague | 2021/05/11 09:15 | Renta Tokuda v Peter Goldsteiner | 3-6,4-6 |
| ITF M25 Prague | 2021/05/10 08:00 | Peter Goldsteiner v Aidan Mchugh | 5-7,7-5,11-9 |
| ITF M25 Prague | 2021/05/09 11:00 | Krystof Zapsky v Peter Goldsteiner | 3-6,4-6 |
| ITF M15 Sibenik | 2021/04/21 11:20 | Aldin Setkic v Peter Goldsteiner | 6-2,6-4 |
| ITF M15 Sibenik | 2021/04/20 08:00 | Peter Goldsteiner v Luigi Castelletti | 7-5,1-6,12-10 |
| ITF M15 Sibenik | 2021/04/19 07:55 | Peter Goldsteiner v Lovre Erceg | 6-1,6-0 |
| ITF M15 Opatija | 2021/03/23 09:00 | Giacomo Dambrosi v Peter Goldsteiner | 6-3,6-2 |
| ITF M15 Opatija | 2021/03/22 08:00 | Mate Voros v Peter Goldsteiner | 2-6,5-7 |